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Protesters gather outside Union Station before heading towards the Colorado Capitol for a Global Climate Strike rally on Friday morning, Sept. 20, 2019. Dozens of youth-led rallies took place across Colorado, and more throughout the country and around the world, beginning Friday.

Boulder High School students wave a parachute with the Earth painted on it as protesters rally outside Union Station before heading towards the Colorado Capitol during the Global Climate Strike on Friday morning, Sept. 20, 2019. Dozens of youth-led rallies will take place across Colorado, and more throughout the country and around the world, beginning Friday and stretching into next week.

Colorado students and protesters gathered at City Park and Civic Center Friday morning as part of a global action to bring attention to climate change on Sept. 19, 2019.

Colorado students and protesters gathered at City Park and Civic Center Friday morning as part of a global action to bring attention to climate change on Sept. 19, 2019.

Michell Weindling of Sunrise Movement leads protesters gather outside Union Station to the Colorado Capitol for a Global Climate Strike rally on Friday morning, Sept. 20, 2019. Dozens of youth-led rallies took place across Colorado, and more throughout the country and around the world, beginning Friday and stretching into next week.

Colorado students gathered at City Park and Civic Center Friday morning as part of a global action to bring attention to climate change on Sept. 19, 2019.

Protesters are heading to the Colorado Capitol for a Global Climate Strike rally from Union Station on Friday morning, Sept. 20, 2019. Dozens of youth-led rallies took place across Colorado, and more throughout the country and around the world, beginning Friday and stretching into next week.

Colorado students gathered at City Park and Civic Center Friday morning as part of a global action to bring attention to climate change on Sept. 19, 2019.

Maggie Pierce, right, waves the flag of the Colorado Sunrise Movement at City Park and Civic Center Friday morning as part of a global action to bring attention to climate change on Sept. 19, 2019.

Colorado students gathered at City Park and Civic Center Friday morning as part of a global action to bring attention to climate change on Sept. 19, 2019.

Protesters are heading to the Colorado Capitol for a Global Climate Strike rally from Union Station on Friday morning, Sept. 20, 2019. Dozens of youth-led rallies took place across Colorado, and more throughout the country and around the world, beginning Friday and stretching into next week.

Protesters gather outside Union Station before heading towards the Colorado Capitol for a Global Climate Strike rally on Friday morning, Sept. 20, 2019. Dozens of youth-led rallies will take place across Colorado, and more throughout the country and around the world, beginning Friday and stretching into next week.

Protesters gather outside Union Station and heading to the Colorado Capitol for a Global Climate Strike rally on Friday morning, Sept. 20, 2019. Dozens of youth-led rallies took place across Colorado, and more throughout the country and around the world, beginning Friday and stretching into next week.